94420 + Interview Questions in Chemistry in Class 12

1.	Compound which is added to soap to impart antiseptic properties is
Answer» BUFFERING agent antiseptic softener drying agent Answer :B

Discussion

2.	Bithional is an example of :
Answer» Disinfectant Antiseptic Antibiotic Analgesic ANSWER :A

Discussion

3.	Bithional is added to soap as an additive to function as a/an :
Answer» SOFTENER HARDENER Dryer Antiseptic. Answer :D

Discussion

4.	Bithional is added to soap as an additive to funcition as alan
Answer» Softener Hardener Dryer Antiseptic ANSWER :D

Discussion

5.	Bithional is added to imart antisepticpropertier in
Answer» WATER fertillzer soap perfumes Answer :C

Discussion

6.	T/F Bithinol is an antibiotic.
Answer» ANSWER :F

Discussion

7.	Bismuth is the end product of the radioactive disintegration series known as:
Answer» 4N 4n+1 4n+2 4n+3 Answer :B

Discussion

8.	Bistler copper is purified by
Answer» paling cupellation ELECTRO refining Bessemeiziation Solution :Blister COPPER is purified by poling and electrorefining method.

Discussion

9.	Bismuth is a strong oxidising agent in the pentavalent state. Or Pentavalent bismuth is a strong oxidising agent.
Answer» Solution :Since the inert pair effect is very prominent in BI, THEREFORE, its +5 oxidation state is much LESS stable than its +3 oxidation state. In other words, BISMUTH in the pentavalent state can easily accept two electrons and thus gets reduced to more stable trivalent bismuth. `Bi^(5+) + 2 e^(-) rarr Bi^(3+)` Therefore, Bi in the pentavalent state acts as a strong oxidising agent.

Discussion

10.	Bismuth in +5 oxidation state is a strong oxidising agent. Why?
Answer» Solution :Due to the LARGEST atomic volume of Bi, the largest nuclear charge, +5 oxidation state of Bi is LESS STABLE and has a strong tendency to accept electrons and reduce to stable +3 state. Therefore BISMUTH in +5 oxidation state acts as a strong oxidising agent.

Discussion

11.	Bismuth forms the only pentahalide with the halogen
Answer» BROMINE FLUORINE CHLORINE Iodine Answer :2

Discussion

12.	Birth control pills essentially contains
Answer» synthetic ESTROGEN synthetic PROGESTERONE Testosteron prontosil SOLUTION :contraceptives derived form estrogen , progesterone

Discussion

13.	Bismuth chloride on hydrolysis forms a white ppt of :
Answer» Bismuth oxychloride Bismuth hydroxide Bismuth oxide Bismuth. Solution :`BiCl_(3)+H_(2)Orarr underset("White PPT.")(BIOCL)+2HCl`

Discussion

14.	Bismuth cannot form stable BiCl_5, due to_____.
Answer» SOLUTION :INERT pair effect (i.e. the reluctance of 6s ELECTRON pairs of Bismuth to PARTICIPATE in BONDING).

Discussion

15.	Birth control pills contain a mixture of
Answer» ASPIRIN + Ibuprofen Luminal + Equanil Norethindrone + ETHYNYLESTRADIOL CIMETIDINE + Brompheniramine Answer :C

Discussion

16.	Birch reduction is observed in
Answer» `CH_(3)-CH=CH-CH_(3)` `HC -= CH` `H_(3)C-C-=CH` `H_(3)C-C-=C-CH_(3)` ANSWER :D

Discussion

17.	Birch reduction is done in the presence of
Answer» Palladium SUPPORTED over CHARCOAL `NA`/`liq. NH_3` `H_2` /` Nickel` `Alc. KOH` Answer :B

Discussion

18.	Biotin is an organic compound present in yeast. It's deficiency in diet causes paralysis. It is also known as
Answer» VIT-A vit-`B_2` vit-`B_(12)` vit-H Answer :D

Discussion

19.	Biotin is an organic compound present in yeast. Its deficiency in diet causes dermatitis and paralysis. It is also known as
Answer» VITAMIN H vitamin `B_1` vitamin `B_(12)` vitamin D Answer :A

Discussion

20.	Biotin is a chemical name of
Answer» VITAMIN H Vitamin `B_(12)` Vitamin `B_(6)` Vitamin `B_(1)` Solution :Vitamin H

Discussion

21.	Biothional is
Answer» SKIN CLEANING AGENT analgesic antibiotic antacid Answer :A::C

Discussion

22.	Biomolecules are formed by certain specific linkages between simple monomeric units. Write the name of linkages and monomeric units in the Nucleic acid class of biomolecules.
Answer» Solution :NUCLEIC ACIDS : Monomer UNITS are nucleotides. The linkage is PHOSPHOR diester linkage.

Discussion

23.	Biomolecules are formed by certain specific linkages between simple monomeric units. Write the names of linkages and monomeric units in the protein class of biomolecules.
Answer» SOLUTION :Protein : Monomeric units are `alpha`-AMINO ACIDS. The linkage is called peptide linkage.

Discussion

24.	Biomolecules are formed by certain specific linkages between simple monomeric units. Write the names of linkages and monomeric units in the starch class of biomolecules.
Answer» SOLUTION :Starch : The monomeric UNITS present is `alpha-D-` glucose. The LINKAGE between `alpha-D-`glucose units is called GLYCOSIDIC linkage.

Discussion

25.	Biomolecules are
Answer» ALDEHYDES and ketones acids and esters carbohydrates, PROTEINS and fats alcohols and phenols Answer :C

Discussion

26.	Biological treatment of water pollution is done with the help of
Answer» Phytoplankton Lichens Fungi None of the above Answer :A

Discussion

27.	Biological specimens can be preserved in
Answer» Formalin Dettol BORIC acid Chlorine water Answer :A

Discussion

28.	Biological reactions associated with positive Delta G values are called :
Answer» Exergonic Endergonic EXOTHERMIC Endothermic Answer :B

Discussion

29.	Biological Oxygen Demand (BOD) is a measure of
Answer» Industrial wastes poured into water bodies Extent to which water is POLLUTED with organic compounds Amount of carbon monoxide INSEPARABLY combined with haemoglobin Amount of oxygen NEEDED by GREEN plants during night Answer :B

Discussion

30.	Biological cells allow the passage of
Answer» WATER molecules selected other NUTRIENT meterials wasted materials lower CONCENTRATED particles Answer :A::B

Discussion

31.	Biological catalyst (enzymes ) belong to :
Answer» Polysaccharides Synthetic polymers Polypeptides Poly NITROGEN heterocycles Answer :C

Discussion

32.	Biodegradable polymer which can be produced from glycine and aminocaproic acid is
Answer» buna-N NYLON 6,6 nylon-2-nylon-6 PHBV Answer :C

Discussion

33.	Biodegradable polymers.
Answer» Solution :POLYMERS which disintegrate by themselves after a certain PERIOD of time due to environmental degradation are CALLED biodegradable polymers. Examples : PHBV i.e. Polyhydroxy butyrate `-CO-beta-` HYDROXY valerate DEXTRON, Nylon - 2 - nylon - 6.

Discussion

34.	Biodegradable polymer which can be produced from glycine and aminocaproic acid is :
Answer» Nylon-2 - nylon-6 PHBV Buna-N Nylon-6,6 Solution :Nylon-2 - nylon-6 Nylon-2-Nylon-6 is an alternating POLYAMIDE copolymer of glycine `(NH_(2) – CH_(2) - COOH)` and amino caproic acid `[NH_(2) - (CH_(2))_(5)COOH]` and is BIODEGRADABLE.

Discussion

35.	Biodegradable pollutants is :
Answer» plastic polythene sewage mercury Answer :C

Discussion

36.	Biodegradable polymer are :
Answer» PVA PHBV NY-66 NY-2-NY-6 Solution :N//A

Discussion

37.	Biochemical Oxygen Demand (BOD) is the amount of oxygen required (in ppm):
Answer» for the photochemical BREAKDOWN of waste present in `1m^3` volume of a WATER BODY . for sustaining life in a water body. by bacteria to break - down organic waste in a certain volume of a water sample . by ANAEROBIC bacteria to breakdown inorganic waste present in a water body . Answer :C

Discussion

38.	BiochemicalOxygen demand (BOD) is ameasureof organicmetrtal present in waterBODvalueless than 5ppm indicate w watersample tobe
Answer» richin DISSOLVED oxygen poorin dissolved oxygen highlypolluted notsuitable for AQUATIC LIFE . ANSWER :A

Discussion

39.	Bio-indicators are used for
Answer» OXYGEN demand Air pollution Mineral present All of these Answer :D

Discussion

40.	Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than 5ppm indicates a water sample to bee__________
Answer» rich in DISSOLVED oxygen poor in dissolved oxygen. highly polluted. not suitable for AQUATIC life. Solution :`CuSdarr+H_(2)Orarr"Noreaction"` `Fe_(2)S_(3)+H_(2)OrarrFe^(2+)(AQ)+Sdarr` `Cr_(2)S_(3)+H_(2)OrarrCr(OH)_(3)darr+H_(2)Suarr` `MgS+H_(2)OrarrMg(OH)_(2)darr+H_(2)Suarr`

Discussion

41.	Bio-gas production is more useful when compared to the directuse of dung because
Answer» both fuel value and fertiliser value are effectively utilized production of BIO gas INVOLVES less labour fuel is quickly PRODUCED the fertilizer produced is a fluid Solution :Biogas production is more USEFUL compared to the direct USE of dung because both fuel value and fertiliser value are effectivley utilised in biogas.

Discussion

42.	Bio chemical catalyst is known as..........
Answer» enzymes associated COLLOID NUCLEIC acid cellobiose ANSWER :A

Discussion

43.	Bio-catalyst are …………………
Answer» GLOBULAR PROTEINS FIBROUS proteins CARBOHYDRATES Lipids Solution :Globular proteins

Discussion

44.	Bio availability of drugs within the body and this branch of study is called............
Answer» SOLUTION :Pharmaco KINETICS

Discussion

45.	Binary solution can be of nine different types depending upon the nature of the solute and solvent waether solid, liquid or gas. They may be further classified as solid, liquid and gaseous solutions based on the component which act as the solvent. Howerver, the liquid solutions are the most important. Both solids and gases dissolve in liquids resulting in homegeneous mixtures i.e., solutions. The solubility is governed by number of factors such as nature of solute and solutions can be expressure etc. The concentrations of the solutions can be expressed in different ways such as normality, molarty, molality, mole fration etc. Out of these, molality and mole fraction are better as they donot change with the change in temperature. as they donot change with the change in temperature. (4) 1000 g of a 4% solution of salt contains :
Answer» 4 g salt 4 moles of salt 40 g of SOLVENT 30 g of salt. SOLUTION :4% of salt solution means 4 g of salt in 100 g of solution 1000 g of solution will contain 40 g of the salt.

Discussion

46.	Binding energy of hydrogen atom is 13.6 eV. The binding energy of a singly ionised helium atom is:
Answer» 13.6 eV 27.2 eV 54.4 eV 3.4 eV Answer :C

Discussion

47.	Binary solution can be of nine different types depending upon the nature of the solute and solvent waether solid, liquid or gas. They may be further classified as solid, liquid and gaseous solutions based on the component which act as the solvent. Howerver, the liquid solutions are the most important. Both solids and gases dissolve in liquids resulting in homegeneous mixtures i.e., solutions. The solubility is governed by number of factors such as nature of solute and solutions can be expressure etc. The concentrations of the solutions can be expressed in different ways such as normality, molarty, molality, mole fration etc. Out of these, molality and mole fraction are better as they donot change with the change in temperature. as they donot change with the change in temperature. (3) The molality of a sulphuric acid solution in which in mole fraction of water is 0.85 is :
Answer» `9.80` `10.50` `10.58` `11.25` Solution :`X_(H_(2)O)=0.85,X_(H_(2)SO_(4))=0.15` `n_(1)/(n_(1)+n_(2))=0.85,n_(2)/(n_(1)+n_(2))=0.15` `n_(2)/n_(1)=(0.15)/(0.85)` TAKING `n_(1)=1000/18` moles `n_(2)=(0.15)/(0.85)xx1000/18=9.80`

Discussion

48.	Binary solution can be of nine different types depending upon the nature of the solute and solvent waether solid, liquid or gas. They may be further classified as solid, liquid and gaseous solutions based on the component which act as the solvent. Howerver, the liquid solutions are the most important. Both solids and gases dissolve in liquids resulting in homegeneous mixtures i.e., solutions. The solubility is governed by number of factors such as nature of solute and solutions can be expressure etc. The concentrations of the solutions can be expressed in different ways such as normality, molarty, molality, mole fration etc. Out of these, molality and mole fraction are better as they donot change with the change in temperature. as they donot change with the change in temperature. (2) CuSO_(4).5H_(2)O is a
Answer» SOLUTION os SOLID in a liquid Solution os solid in a solid Salt only and cannot be celled a solution Co-ordination COMPOUND of copper with water MOLECULES as the ligand. Solution :is a solution liquid in solid.

Discussion

49.	Binary solution can be of nine different types depending upon the nature of the solute and solvent waether solid, liquid or gas. They may be further classified as solid, liquid and gaseous solutions based on the component which act as the solvent. Howerver, the liquid solutions are the most important. Both solids and gases dissolve in liquids resulting in homegeneous mixtures i.e., solutions. The solubility is governed by number of factors such as nature of solute and solutions can be expressure etc. The concentrations of the solutions can be expressed in different ways such as normality, molarty, molality, mole fration etc. Out of these, molality and mole fraction are better as they donot change with the change in temperature. as they donot change with the change in temperature. (1) solubility carve of Na_(2)SO_(4).10H_(2)O in water with temperature is a give as
Answer» Solubility PROCESS is EXOTHERMIC Solubility process is exothermic till `34^(@)C` and endothermic after `34^(@)C` Solubility process is endothermic till `34^(@)C` and exothermic after that Solubility process is endothermic. Solution :is the correct ANSWER.

Discussion

50.	Binary liquid solutions which exhibit positive deviations from Raoult's law boil at temperature………..than the expected boiling point.:
Answer» Lower Higher Same Can not be said Answer :B

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Compound which is added to soap to impart antiseptic properties is

Bithional is an example of :

Bithional is added to soap as an additive to function as a/an :

Bithional is added to soap as an additive to funcition as alan

Bithional is added to imart antisepticpropertier in

T/F Bithinol is an antibiotic.

Bismuth is the end product of the radioactive disintegration series known as:

Bistler copper is purified by

Bismuth is a strong oxidising agent in the pentavalent state. Or Pentavalent bismuth is a strong oxidising agent.

Bismuth in +5 oxidation state is a strong oxidising agent. Why?

Bismuth forms the only pentahalide with the halogen

Birth control pills essentially contains

Bismuth chloride on hydrolysis forms a white ppt of :

Bismuth cannot form stable BiCl_5, due to_____.

Birth control pills contain a mixture of

Birch reduction is observed in

Birch reduction is done in the presence of

Biotin is an organic compound present in yeast. It's deficiency in diet causes paralysis. It is also known as

Biotin is an organic compound present in yeast. Its deficiency in diet causes dermatitis and paralysis. It is also known as

Biotin is a chemical name of

Biothional is

Biomolecules are formed by certain specific linkages between simple monomeric units. Write the name of linkages and monomeric units in the Nucleic acid class of biomolecules.

Biomolecules are formed by certain specific linkages between simple monomeric units. Write the names of linkages and monomeric units in the protein class of biomolecules.

Biomolecules are formed by certain specific linkages between simple monomeric units. Write the names of linkages and monomeric units in the starch class of biomolecules.

Biomolecules are

Biological treatment of water pollution is done with the help of

Biological specimens can be preserved in

Biological reactions associated with positive Delta G values are called :

Biological Oxygen Demand (BOD) is a measure of

Biological cells allow the passage of

Biological catalyst (enzymes ) belong to :

Biodegradable polymer which can be produced from glycine and aminocaproic acid is

Biodegradable polymers.

Biodegradable polymer which can be produced from glycine and aminocaproic acid is :

Biodegradable pollutants is :

Biodegradable polymer are :

Biochemical Oxygen Demand (BOD) is the amount of oxygen required (in ppm):

BiochemicalOxygen demand (BOD) is ameasureof organicmetrtal present in waterBODvalueless than 5ppm indicate w watersample tobe

Bio-indicators are used for

Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than 5ppm indicates a water sample to bee__________

Bio-gas production is more useful when compared to the directuse of dung because

Bio chemical catalyst is known as..........

Bio-catalyst are …………………

Bio availability of drugs within the body and this branch of study is called............

Binding energy of hydrogen atom is 13.6 eV. The binding energy of a singly ionised helium atom is:

Binary liquid solutions which exhibit positive deviations from Raoult's law boil at temperature………..than the expected boiling point.: